Sourcing rough porphyry blocks from China

Duty and waste controls for rough porphyry

Read from the UK Trade Tariff on 8 November 2026, heading 2516 covers granite, porphyry, basalt, sandstone and other monumental or building stone, crude, roughly trimmed or merely cut into rectangular blocks or slabs. Rough porphyry falls within other monumental or building stone, 2516 90 00 00. The table includes the neighbouring granite and sandstone lines for comparison.

The recorded duty on goods from China is 0% throughout the heading, with no anti-dumping or countervailing measures and no suspensions listed. The tariff attaches import and export waste controls. For a China shipment, ask your customs broker to confirm whether the stone is waste and which requirements apply. If notification controls apply to an import into England, shipping can begin only after consent from the Environment Agency and the other competent authorities involved.

Confirm the commodity code using the stone identity, shape and processing description. Polished, flamed, edged or otherwise worked stone falls outside this rough-stone scope, as explained in the site's existing stone guide. See rough basalt blocks for the wider heading.

Specify the quarry bed and usable block

Specify porphyry by quarry and extraction bed, supported by a petrographic description rather than a colour name alone. Agree the background colour, visible crystal pattern, acceptable veins and iron staining against wet and dry samples from the proposed supply.

Write down the required block dimensions, trimming allowance, acceptable cracks and intended cutting direction. Agree how usable material will be assessed after sawing. Ask for density, water absorption, strength and frost-resistance reports relevant to the intended use and traceable to the same quarry bed.

Agree individual block identification, recorded weights, supports and lashing before loading. Plan the lifting and unloading method with the receiving yard, and arrange dust controls for subsequent cutting.

Worked duty example

Illustrative example, not a quote: Illustrative order: 25 tonnes of rough porphyry blocks under 2516 90 00 00, invoiced at £11,000 free on board, with £2,400 of freight and insurance to the UK. The customs value is £13,400. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £13,400, so it is £2,680. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Identity: match block markings and quarry records to the approved bed and samples; check colour and crystal pattern on wet and dry faces.

Soundness: inspect accessible faces for open cracks, weathered zones, weak veins and iron staining; photograph defects before dispatch and on arrival.

Dimensions: measure the block envelope and usable cutting area against the order, allowing for irregular faces and agreed trimming.

Loading: check recorded weights, sound supports, lashing and block separation; compare arrival damage with loading photographs before processing.

What goes wrong

A colour sample can hide variation across a quarry bed. A block may look sound outside but reveal fractures or weak veins when sawn, reducing usable yield. Keep a sample from the agreed supply and request a trial cut where internal soundness matters.

Orders also fail when the supplier substitutes a similar-looking stone, measures across unusable projections or ships blocks with unsupported edges. Make acceptance criteria explicit and arrange quality inspection before loading.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.